As heartbreaking as it is, I'm inclined to agree with Dorvaan. Go back to the store, demand to speak to the manager, and make it clear you'll be reporting them for animal mistreatment. Then, follow through. Take pictures of the snake and contact your local ASPCA or Humane Society and file a report. If they can't take a report, find out who can. If you have a reptile rescue near by, they may know who to contact.
It's true that reporting them may not do anything for that poor little guy, but buying him will only encourage the store to contribute to the suffering of others like him.![]()